Doll head or bearing for drying cylinders



v 4 G- DOD.

, DOLL HEAD 0R B'EARING FOR DRYING CYLINDERS.

' APPLICATION FILED NOV..15|'|921. 1,425,635.

Patented Aug. 15, 1922 9 SHEETS-SHEET 1.

m DOLL HEAD 0R BEARING FOR DRYlNG CYLINDERS. APPLICATION FILED NOV. 15. I921. 1,425,635. Patented Aug. 15, 1922:;

9 SHEETS-SHEET 2.

DOLL HEAD 0R BEARING FOR DRYING CYLINDERS.

APPLICATION men Nomi, m1.

1,425, 5, PatentedAug.1 5,1922,.

9 SHEETS-SHEET 3.

. I G, DOLL HEAD 0R BEARING FOR-DRYlNG-CYUNDERS- r I APPLICATIUN FILED NOV. 5. F921- 7 1,425,635. 7 Patented Aug. 15, 1922'.

9 SHEEIS-SHEET 5.

ja /wa G. DOD. DOLL HEAD 0R BEARING FOR DRYING CYLINDERS.

APPLICATION HLED NOV. 15, I921.

' Patented Aug. 15

1922; 9 SHEETS-SHEET 6.

lllll a; 000. DOLL HEAD 0R BEARING FOR DRYING CYLINDER- S.

APPLICATION FILED NOV) I5. 1921..

QSHEETS-SHEET 1." r

G. DOD. v DOLL HEAD 0R BEARING FOR DRYING CYLINDERS.

' APPLICATION mm NOV. 15. 1921.

1,425,635, I Patented Aug. 15, 1922.

Q'SHEETS-SHEET 8.

GERALD DOD, OF SOUTHPORT, IE'ILTG-LAIBI'I).

DOLL HEAD OR BEABINGFOR nRYiNe CYLINDERS,

' To all whom it may concern:

Be it known that I, GERALD DOD, a subject of the King of Great Britain and Ire-' land, residing at Southport, Lancashire,

England, have invented new and useful Improvements in or Relating to the Doll Heads or Bearings for Drying Uylinders, of which the following is a s ecification.

-This invention reters to the doll heads, or

bearings of drying cylinders for drying fabrics, paper and the like. Usually the doll heads serve to axially support the hollow trunnions of each cylinder and also to-con-- veysteam and water of condensation or hot air to and from the cylinder via the trunnions, and in'order to'afford a fluid-tight joint between the doll heads and the trunnions it is customary to use packing between the doll. heads. and trunnions capable of being tightened up by a gland. Provided the doll. heads and cylinder trunnions are truly aligned the joints are easily main- .tained in good order, but should the doll heads be outof line, the said joints are diflicult to maintain and leakageof the joints takes place.

' Examples of want of alignment maybe (1) .the doll head for one end of the cylinder is parallel with ,but out of line with the doll head for the other end of the cylinder; (2) the doll heads are not parallel with' each other, in any plane; (3) the trunnions on either side of the cylinder are (a) paral lel with each other but out of line or (b) not parallel with eachother in any plane.

With the first example, the want of alignment'can be met by arranging the doll heads corresponding to take up a true line position and fixing them in such position, but in the second and. third examples, the mere adjustment of the doll heads will not overcome the difficulty, since'the trunnions'of the cylinder, whilst rotatingabout their own longitudinal'axis, or that of thedoll heads, such longitudinal axis tends to rotate about a further axis to the main axis of the cylinder. Y

' The errors in alignment mayv be due to "errors in manufacture or erection of the doll heads, or in the manu-facture or erection of the machine frames, :and (or) in the turning or 'fit'tingof the cylindertrunnions.

The cause of the joints leaking is usually attributed to want of'efllciency of the pack;-

pe'cification ofLetters ratent. Pat t d Application filed November 15, 1921. Serial No. 515,372.:

ingfand various arrangements have been proposedfor dispensing with-the packing and substituting other jointing'means but the primary cause of the joints'leaking is usually not want of efliciency. of the packing but the mal-alignment of thedoll heads ongearings, or cylinder trunnions as aforesal Y i The effect of the trunnions or'doll-heads being out of line and out of p arallel,'is to cause the opening in the bearing'parts of the doll heads and packingjto become enlarged, and thus break the joints as well as damage the bearings.

One of the objects provide, a form of bearing 'for' drying -cyl inders, which is self-aligning, 1.- e. in whichany want of alignment in the doll heads or trunnions at the opposite'ends'o-f avcylinder has no ill effect on the bearings,- or on the joints, the onefbea'ring being suitable.

for any of the errors "of alignment 1, 2 or 3aforesaid. 1

of this invention is to i 'Inusing packing material to maintainthe i joints between'the doll heads and trunnions the packing is usually tightened up to. an extent which puts considerable friction on the trunnions and thus adds to the resist j' ance to rotation of the'cylinder. i

1 A further object of this invention ,isan

arrangement of surface'or'. packed joint which is not affected by want of alignment of the bearings or cylindertrunnions, and does not therefore require to be I tightly packed. a

In known arrangements previously proposed for dispensing with the packing, the cylinder trunnions have been mounted in bearings separate 'from the means for main: taining the fluid joints, these latter being in the nature of spherical faced parts, held. together by springs, any elongation and' contraction of the cylinder bei'lig allowed for by relative movement between the spherical faced parts. I whilst also a]lowing for any want of align- Such parts. however, v

ment of the trunnions relatively to the jointing members, do not gurethe error of alignment between the bearings or trunnions themselves situated at each end of the Y "cylinder, and consequence these latter arev subject to excessivewear, the, bore of the bearing tending to become'enlarged at one or both ends. A further fault of these previously proposed arrangements is that inder.

In the said known arrangements in which the spherical faced joints are employed, the joints are arranged at points removed from the bearings, and on that side of the bearings furthest from the cylinder. In these circum'stances any mal-alignment of the bearings or trunnions is of the greatest magnitude at the joints, thus increasing the tendency of the joints to be broken.

Another object of this invention is so to arrange the joints that any want of align ment of the bearings or trunnions will have practically little or no effect on the joints.

A furtherobject is to combine with the improved bearings anti-friction balls or rollers whereb the wear of the revolving parts is reduce to a minimum, said balls or rollers being entirely enclosed and protected from dust, vapour, etc., and the grease used for lubricatmg the ball or rollers prevented reaching the cloth on the cylinders, said balls or rollers in one application being arranged so that with any angular movement of the trunnion within the bearing, no end thrust is put on their race rings, but such angular movement is controlled by radial loads on the bearings, thereby prolonging the life of the antifric tion members indefinitely.

According tothe invent1on,'each cylinder trunnion is supported by bulbous or ball-like part, carried either by the doll head, or by a stationary annular member, surrounding. the doll-head, said ball-like art when carried by the doll 'head being held stationary and when carried by the sta tionary annular member being free to swivel within limits, whilst-also being free to slidebodily with any elongation or contraction of the cylinder. Within the said ball-like part and therefore at a radius less than that of the periphery of arranged the means for making the fluidtight joint between the doll head and. the cylinder trunnion, the saidv joint being in a plane passing through (or as near as possible to) the centre of the ball-like'part.

.Uponthe trunnion is fixed a tubular member which extends-in itself, or with suitable additions, over the end of the doll head,'and

, beyond the ball-like part, which thereby serves toform the bearing proper of the cylinder trunnion. v

With any-mal-alignment of the doll heads, the'b'all-like part of each bearing allows the tubular member on the trunnion to take up an angular position relatively to the doll head corresponding to the degree of error 1 of alignment and, in suchposition, be free to rotate without injuryto the bearing.

' ings) being the balls or rollers, or

the ball-like part, is

forced rubber tubing eas es whilst by reason of the jointing means bein arranged within the ball-like part, the efi ect of the mal-alignment of the doll heads on the joints is practically nil. In applying anti-friction balls or rollers to said bearing, they are arrangedbetween the said tubular member on the trunnion and the ball-like part, suitable means being provided to carry and osition the race rings, and end covers (swlvelling with the bearrovided'to exclude dust, vapour, etc., an retain the grease used in lubricating the bearings.

The invention will be with the aid of the accompanying drawings, wherein:'

Fig. 1 and Fig. 1 a longitudinal sectionalelevation of one example of the improved self-aligning bearings, I

Fig. 2 illustrates 'a modification of part of Figure 1, in section.-

Fig. 3 illustrates a longitudinal sectionalelevation of another example of the bear- Fig. 10 illustrates a longitudinal sectionof a further modification.

Figs. 11 and 12 illustrate respectively a side view (partly sectional) and an endv view of a further example of the invention.

In carrying out the invention in one convenient manner and as illustrated in Figure 1, the doll head 1 is formed with a plain further described collectively illustrates parallel-sided horizontal part 1 on the end of which is secured, by welding or other suitable means, a metal ball 2. Such ball is provided with a through orifice, and when fixed to the doll head overhangs the same as shown, .one end' of said orifice being adapted to fit the doll head, whilst the other end is enlarged. To, that part of the doll head within the said metal ball (and thereby protected)- is secured one end of the jointingmember' 3, such as a short length of rein- (see Figure, 1) offlexible metallic tubing (see Figure 2) the other end of said member being secured to a metal tube 4,which-forms' part of afurther jointbetween itself .and the cylinder trunnion 5.- Such further joint may spherical face be a conical or on the end of the metal tube 4 bearing against a conical or spherical seatin on the trunnion5, said seating, ifdesired, being faced with packing 6. Y

On the cylinder. trunnion {5 is rigidly'secured a tubular member 7, which forms an extension of the trunnion and which extendsfibrous or metallic v over the end ofpthe doll head and lies .around the metal ball 2. Between this latter and the said tubular member is a two-part sleeve shaped to fit the ball, the parts 8, 81of the sleeve being connected together by one screwing or fitting into the other, and by one or more set screws 9 screwing through one or both of the overlapping parts. By means of one or more pins 10 carried by the two v part sleeve engaging a groove or grooves in the ball 2 parallel with the axis of the bearing, the said sleeve is prevented rotating whilst left free .to swivel in the direction of the grooves, and around the pins, within the limit allowed by the clearance left between,

such sleeve and the 'doll head. The said metal tube 4: aforesaid, to which the jointing member 3 is secured, is provided w1th pins 11 or the like which slidably project into holes in the end of the said two-part sleeve, thereby causing said tube and sleeve to maintain alignment with each other,

. and prevent the tube rotating with the trunthe pressure for maintaining the joint will.

nion. A spring 12 (or the pressure of the fluid passing through the bearing) servesto yieldingly force the said metal tube against its seating. Instead of the end of the sliding tube being formed conical, or spherical to engage a like face on the trunnion, it may be plain and slide within the trunnion (or upon a projecting part of the trunnion) and the joint bev m'adeby means of packing. In either of the arrangements be comparatively light and not such as to put'any undue friction onthe trunnion.

Between the said two-part sleeve and the 1 trunnion extension 7 are arranged the antif friction balls (or rollers) 13 and their race rings 14, there being preferably two setsof rings and balls (or rollers) and one set to.

I the right and the other to the left of the centre of the ball 2 on the doll'head. The outer race rings are secured to the said trunnion extension by means of two end flanges 15, 15 and ya distance sleeve or ring 16, whilst the inner race. rings are mounted (with a sliding fi t) upon the two-part sleeve.

'With the anti-friction balls (or rollers) thusapplied any angular or swivelling movement of the trunnion will not injure the balls (o-r rollers) or rings. Holes may be provided about an axisc'orrespo'ndingto a straight.

line drawn from the centre of the balllike part of one doll head tothe centre of l the degree of and keyways 17 ball-like part of the other doll head, or the trunnions 5 oscillating continuously about the ball-like parts to an extent corresponding to the degree of mal-alignment. It will also be seen that the weight'or load of the cylinder comes on the ball-like parts carried by the doll heads and not on the jointing members 3. Further, by arrangingthe jointing members 3 within the ball-like parts any mal-alignment between the doll heads, or

trunnions, does.not injuriously affect the being negligible. r-

In carrying, out the invention according to another example and as illustrated in Figures 3 and 4, the jointing member is arranged on the end of the part 1 ,ofthe doll deflection (if any) head 1, and is preferably in the form of an elastic or flexible packing ring 17 Such jointing member bears against the inner face of a tubular part 18 carried by atightly fittmg tubular. extension 19 of the cylinder trunnion 5, and the arrangement is such that the packing ring 17 has tomaintain the joint aga nst the-rotary, angular and longitudinal movements of the trunnion and said tubular extension.

I The anti-friction balls (or rollers) are arranged outside the tubular extension 18 and the outer race rings 19 are carried by a cylindrical member 20, the

outer periphery of which is shaped to form,

part of a sphere. En'circling such member 20 is a Stationary ring or housing '21 carried from the doll head, the spherical face of the cylindrical member 20-; contacting with the inner face ofthe stationary ring orhousing 21., By means of a stud 21*" in the housing and groove in the member 20, the latter while free to swivel is prevented rotating.

The curvature of thespherically shaped member 20 is struck from a centrewhich lies. in a plane coincident with or'near to thatin which the jointing member 17 lies,

and therefore, any mal-alignment of the: trunnions or doll heads'will not injuriously affect. the joint.

As shown in Figure 3*,thejjointing member ma-y bemade inltwoparts 173, 17", the

part 17 a being made say of fibreand the part i 17* being made of metal, and' to allow of the elongation and contraction of the cylinder, thepacking may be adapted to slide along part 1 of the (doll head, suitable keys rotation. I I e Tofacllitate the assembling or ad ustment being provided to prevent of'the parts and to allow of the packing' being renewed or examined without'disturbing 'the doll head as awhole, that. part 1*" of the doll head carrying the jointing mem-;

.ber is made separate from the otherpart of the doll head,-'this latter being formed with i ahead part or bo'ssl bored to receive the partla which extends through the-said head part or boss and is secured against-- rotation and in position by a screwed ring 1. In that portion of the part 1 lying within the boss 1 are openings for the passage of steam or water to or from the cylinder.

Although preferring to employ two sets of anti-friction balls or rollers, one set only may be used preferably arranged in the plane of'the swivel centre. Figures 5 and 6 show one example of this arrangement. The outer race ring 22 is formed spherical on its periphery, and contacts with a like inner face of the ring 23, this latter being cylindrical outwardly, tatably fitting the stationary ring 21. Also fitting the-ring 22 are end flanges 24, 24*, which are free to swivel with the outer race ring within the ring 23. Said end flanges lie close to the part 19 and a sleeve 19 on such part, so. that whilst "the anti-friction balls carry the principal running load, the flanges 24 24 form plain bearings for the swivelling motion and at thesame time act as protectin end covers for the balls (or rollers) an rings. This arrangement of rings 22, 23 balls and flanges, is an adaptation of the known self-aligning ball bearings to the purpose of this invention. j

The flan es 15 in Figure 1, the flanges 20 in igure 3, and the flanges 24*, 24

in Figure 5, form end covers which serve to exclude dust, vapour, etc., from the antipacking rings 15, or

friction bearings and thereby considerably prolong the life of the bearings. Said end covers also serve to retain the oiLor grease used to lubricate the bearings, their inner edges being formed with annular grooves as in Figures 1 and 3 to receive felt or like being merely grooved as shown in Figure 5. With the parts carrying the inner and outer race rings always parallel, the end flanges or covers always maintain the same relative positions, what-- ever may be the mal-alignment of the doll heads or trunnionsand thereby enable them toalways effectively protect the anti-friction bearings from dirt, vapour, etc.

Whilst describing the sets of anti-friction .balls or rollers ,as' being arranged to right and left respectively of the ball-like or spherical part of each doll head, both sets may be arranged to one ,side ofthe said part, and preferably on the cylinder-side,

one such arrangement being shownfin diagram in Figure 1O.

In lieu of the packing shown in: Figure 5, a gland type of packing may be used, as

shown in Figure 5. I

As shownin Figure 7, a white metal or like anti-friction liner 21 may be provided between the housing 21 and the ring 23; or

the ring 23 itself may be madev of'white metal or the like And-as shown in Figure 8, thering 23 may be dispensed with, 'and'the and slidably and roling action of the trunnion,

Leas es 24 being provided hold the parts together.

Instead of the flanges or end covers being fitted to the ring 23, they may be fitted and bolted to the housing 21 as shown in Figure 9.

As shownin Figures 11 and 12, a ring 25 curved and thereby provide the necessary swivel support for the trunnion. One of the rings 25 is held against angular movement by a set screw27, the point of which enters a hole in the doll head. The ring at the opposite end of the cylinder is-left free to allow for the endwise elongation or contraction of the cylinder. Instead of being pivoted to the lower partof the doll' head, the ring 25 may be. suspended from a pivot carried by an overhanging'extension of the doll head.

. The packin ring 28 may be made to two diameters see igure 11, and-one end tightly fit within an annular recess in the the pressure of the steam or other fluid pass- 5 ingto the cylinder helping to hold the pack ing ring in position. -The packing may be bevelled at the end within the recess to ensure of a close joint, and dowel pins 29 may be used to prevent rbtation of the packing e improved self v ligning rinlg relatively to the part 1*.

I h be adaptedto be used-las plain bearings, 1; e.;

- without the anti-friction balls or rollers, the

bearings may essential feature of the invention being the free-swivelling' bearings mounted in such. 'a

manner as to eliminate the load due to malalignment strains, and so arranged as to give rotection to the conduit joints.

W at I claim is I 1. In combination, a stationary doll-head conduit, a hollow cylinder trunnion, a balllike or spherical member'between the conduit and the trunnion by which the trunnion is axially supportedabout the conduit and by which the trunnion is free to swivel andmove endwise and means within the ball-like or spherical member whereby a fluid tight joint is provided between the.

conduit-and the trunnion, the said ball-like .or spherical member taking nopart of the jointing functions of the bearing, whilst the jointing means are unaffected by the swivelas set forth.

2. In combination, .a stationary doll-head cOnduit, a hollow cylinder trunnion, a tubular member coaxial with the trunnion, a

flexible'packing' ring coacting with the conduit and tubularmember to make aconduit joint and a ball-like or universal bearing for the trunnion outside and surrounding the said conduit joint, and (meeting with the conduit to support the trunnion axially and allow of universal axial and endwise movements of the trunnion, without adversely aifecting the conduitjoint, as set forth.

3. In combinatioma stationary doll-head conduit, a hollow cylinder trunnion to which the conduit is adapted to be connected while allowing of the rotating and endwise movenion axially and also to allow universal axial movements, the said members also allowing of endwise movement of the cylin (ler trunnion towards. and away from the doll-head conduit, and the free rotation of the trunnion, as set forth.

' 4. In combination, a stationary doll-head conduit, a hollow cylinder trunnion, a'tubular member forming an. extension of the trunnion, an annular member loosely mounted on said tubular member but incapable of moving endwis independently of the tubular member, the periphery f the annular trunnion axially and allow of universal member being-part of a'jsphere, a ring or housing supported by the doll-head, and with which the said spherical annular member coacts to axially support the trunnion, and a flexible packing ring carriedby the 'doll-head conduit and lying within and making contact with the said' t'ubular member,and also lying within the radius of the spherical contour of the annular ring, space being left between the doll-head conduit and the tubular memberrto allow of the'clear anc necessary for any mal alignment of the doll -head trunnion, asset forth. 5. In combination, a .stationa conduit, a hollow'cylinder trunnion, a tubular member forming an extension of the trunnion, an annular member exterior to and concentric with said tubular member, having aperiphery which forms part of a sphere, anti-friction devices between said annular member and the tubular member,

and means whereby the annular member and anti-friction devices are incapable of moving endwise independently of the tubu- -lar member, a ringor housing-supported by the doll-head, within which the annular member may slide an d' by which it serves to axially support the trunnion and also allow of universal axial movements andendwise movements of the trunnion, a flexible packing ring carried by the doll-head conduit and lying within and making contact with the said tubular member, and also lying within the radius of the annular ring,'space being left between the doll-heatl conduit and the tubular member to allow of the clear:

ance necessary for any mal-alignment of the trunnion, as set'forth,

. 6. In combination astationary doll-head conduit, a ring'or housing supported-by said conduit, a hollow cylinder trunnion, a tubular extension fixed to said trunnion and overhanging the end' of same, a packing fing carried by the doll-head conduit, and

yin tubu ar extension of the trunnion, an an- Within and contacting with the said nular' member surrounding said tubular member, and having a periphery corresponding to part of a sphere, and coa'cting with the said ring or housing to'support the ber surrounding said tubular member and having a perlphery corresponding to part of a sphere, and coacting with the said ring ,within' and contacting'with the said tubular extension of the trunnion, an annular mom-- 01' housing to support the trunnion axially and" allow of universal axial movement and endwise movement of said trunnion, antifrictiondevices being provided between said tubular extension of the trunnion and the annular member to reduce friction and said annular ring having. end flanges which en-Y close the anti-friction devices, as set forth.

In testimony whereof I have signed my name to this'specifica'tion,

GERALD DOD, 

